Victor has been instructed to stack boxes on a freight dock, arranged in perfect squares. If he has 625 boxes in each square, how many boxes are on the bottom row of each square?

A perfect square arrangement has the same number of boxes in each row and column. The number of boxes on the bottom row is the square root of 625: √625 = 25, since 25 × 25 = 625. So the bottom row has 25 boxes, choice C.

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